The technology surrounding personal computers is changing every day. With increased emphasis on faster processing time and smaller dimensions, computers now have quicker clock speeds and greater power consumption than their predecessors. But these features are also responsible for the excessive heat produced during operation. While computer devices of the 80’s relied more on a passive cooling mechanism for temperature management, all modern devices today rely on an efficient active heat dissipation plan. At the center of these designs are the axial fans that are responsible for directing cool air over components to drive out heat and maintain optimum performance temperature.
The Need for an Axial DC Cooling Fan
All semiconductor devices come with a manufacture defined temperature specification. It is important for the stability and lifespan of the device that the system perform in this temperature range. However due to the high voltage operations and excessive heat dissipation from some devices, the system temperature tends to increase above the safe limit. If the temperature is not regulated, the components will have a much shorter and unstable life span, frequented with system crashes and data loss. To avoid this, today’s systems require a cooling fan mechanism that uses air as the convection medium to drive the heat generated by these devices out.
Operation of an Axial DC Cooling Fan
Axial fans are designed to direct the flow of air parallel to the central shaft of the fan. The cool air is drawn over the heated component, driving the temperature down to the optimum range. However with the increased complexity of computer devices, modern CPU designs require cooling fans that can provide variable fan speed as per the temperature requirements. This led to the gradual phasing out AC fans and the acceptance of DC fans as an industry wide standard. As the fan speed of DC cooling fans is directly proportional to the supply voltage, the temperature of the device can be controlled by modulating the input voltage of the fan. The voltage is regulated by a system of heat sensors and software that can change the voltage and the fan speed with precise accuracy.
Advantages of a DC over an AC Cooling Fan
Depending upon the type of the power source used to drive the motor, fans are categorized as AC (Alternate Current) fan or DC (Direct Current) fan. Listed here are some of the major differences between the two:
- Because of the difference in power supply, AC and DC fans have an entirely different architecture. The structure of DC fans is much simpler, giving them a much longer life than AC fans. This simpler structure also reduces maintenance cost and the likelihood of component replacement.
- DC fans consume less power than AC fans. While the exact difference between the power ratings of the two fans depends upon the precise device specification, on average DC fans consume 60 % less power than AC fans.
- The revolutions per second rate in a DC fan can be varied with the input voltage. This gives DC fans the added advantage of being able to adapt to the air pressure required. Most modern devices have come with preinstalled software in the computer BIOS that monitors as well as customizes the fan speed for optimum cooling.
- The earlier DC fan design made the device more expensive than its AC counterpart. But with improvements in design and with the introduction of new manufacturing materials, the DC fan cost has come down significantly. With lower maintenance costs and limited power consumption, DC fans have proven to be more value for money than AC fans.
The Axial DC cooling fan is an important part of the CPU. Ensuring that you invest in axial fans that are manufactured by reputable organizations can add several maintenance free years to your computer.